54. 'Two of Us'

Main Writer: McCartney Recorded: January 31, 1969 Released: May 18, 1970Not released as a single

This sweet, mostly acoustic number seems to be McCartney's tribute to his long-standing friendship with Lennon — especially when you look at the rehearsal clip of the song that appears in the Let It Be movie, showing Lennon and McCartney reprising their old habit of singing into the same microphone. In fact, it's about McCartney and Linda Eastman, who were married six weeks after the song was recorded. "We used to send a lot of postcards to each other," she said. The two of them liked to go for long drives together, with McCartney's sheepdog, Martha, in the back seat, heading off for nowhere in particular.

The session that yielded the album version of "Two of Us" (as well as the basic tracks for "Let It Be" and "The Long and Winding Road") was held the day after the Beatles' rooftop concert and wrapped up the Get Back experiment — a messy month of filming and recording. The "bass" part of "Two of Us" is actually played by Harrison on the low strings of an electric guitar, and the whistling at the end is provided by Lennon.